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There is an increasing interest in using non-wood lignocellulosic materials for the production of wood-based medium density fiberboard (MDF). Agave durangensis Gentry bagasse is a waste product produced in large quantities in the mezcal industry. This study evaluated the incorporation of A. durangensis bagasse fibers (ADBF) to elaborate MDF wood-based panels. Three types of panels with different ratios (wood fibers: bagasse fibers) were investigated. The ratios evaluated were 100:0, 90:10, and 70:30. The density profiles, water absorption, and thickness swell of the panels were determined, as well as the modulus of elasticity (MOE), modulus of rupture (MOR), and internal bond (IB), according to the ASTM D1037-06a standard. The results were compared to the ANSI A208.2-2016 standard. The effect of the addition of ADBF on the properties of the panels was analyzed. Density profiles were comparable among the three types of panels, while water absorption, thickness swelling, MOE, MOR, and IB were similar between panels with ratios of 100:0 and 90:10. Panels with 10% and 30% of ADBF meet the minimum ANSI requirements for quality grade 115. It is feasible to use up to 30% of ADBF in the manufacture of wood-based MDF panels.

Several species of the genera Eucalyptus and Acacia are suitable for biomass production useful in energy generation. The objective of this research was to evaluate the survival and chaof four dendroenergetic species in three population densities. A randomized block design with three replications was used in three sites (Collipulli, La Aguada and Pilpilco Abajo plots) with contrasting edaphoclimatic characteristics. Eucalyptus globulus, Eucalyptus denticulata, Eucalyptus nitens and Acacia dealbata were studied in three plantation densities (5 000 trees/ha, 10 000 trees/ha and 15 000 trees/ha). The survival percentage and characteristics of stump regrowth characteristics of each stump were evaluated. The variables specie, plantation den­sity and planting site affected the analyzed parameters. Plantation density affected the diameter and height of prevalent sprouts of proventic proventitious shoots in all species. Hihest stump survival rate (97 %) was presented by Eucalyptus nitens in Pipilco Abajo, with 79 % shoots survival of sprouts at a density of 5 000 trees/ha. However, at densities of 15 000 trees/ha, regrowth survival was 29%. The Acacia dealbata is a species characterized by its colonization capacity. However, at La Aguada, which had population densities of 5 000 trees/ha and 10 000 trees/ha, it showed a low stump (19% and 18 % respectively) and shoots (57 % and 63 % respectively) survival rate. The species Eucalyptus globulus showed high stump and shoot survival rates in all sites evaluated, therefore it can be considered a good option to optimize the scrub system., Varias especies de los géneros Eucalyptus y Acacia son adecuadas para la producción de biomasa útil en la generación de energía. El objetivo del presente estudio fue evaluar la su-pervivencia y características del rebrote en tocones de cuatro especies dendroenergéticas en tres diferentes densidades poblacionales. Se utilizó un diseño de bloques completos al azar con tres repeticiones, en tres sitios (Parcelas Collipulli, La Aguada y Pilpilco Abajo) con características edafoclimáticas contrastantes. Se estudió Eucalyptus globulus, Eucalyptus denticulata, Eucalyptus nitens y Acacia dealbata en tres densidades de plantación (5 000 árboles/ha; 10 000 árboles/ha y 15 000 árboles/ha). Se evaluó el porcentaje de supervivencia y las características del rebrote por tocón. Las variables especie, densidad de plantación y sitio de siembra afectaron los parámetros analizados. La densidad de plantación afectó el diámetro y altura de los rebrotes dominantes de tipo proventicio en las cuatro especies estudiadas. La mayor tasa de supervivencia de tocones (97 %), la presentó Eucalyptus nitens en Pipilco Abajo, con 79 % de supervivencia de rebrotes a una densidad de 5 000 árboles/ha. Sin embargo, en densidades de 15 000 árboles/ha, la supervivencia de rebrote fue de 29 %. Acacia dealbata es una especie reconocida por su capacidad de colonización, sin embargo, en La Aguada, con densidades de siembra de 5 000 árboles/ha y 10 000 árboles/ha, mostró baja tasa de supervivencia de tocones (19 % y 18 %, respectivamente) y de rebrotes (57 % y 63 %, respectivamente). La especie Eucalyptus globulus mostró altas tasas de supervivencia de tocones y rebrotes en todos los sitios evaluados, por lo que puede ser considerada como una buena opción para optimizar el sistema de monte bajo.

INTRODUCTION: In Durango, forest plantations with woody species reached 1,866 ha in 2013 (SEMARNAT, 2013). Forest plantations have been recommended under irrigation and agricultural lands for the intensive production of wood, pulp and firewood, as well as for Christmas trees cultivation. In 2015, intensive production of forest biomass was supported using different pine species such as Pinus greggii, P. cembroides and P. engelmannii. High yield potential has been also detected in the same production areas for agricultural crops such as common bean (Phaseolus vulgaris), which is considered as a productive and profitable option by farmers in order to obtain food and economic benefits during pine timber production. Decrements have been observed in grains per pod, grains per plant and harvest index, as percentage of shade increased (Hadi et al., 2006). The objective of this study was to evaluate shade effects on yield of Pinto Saltillo common bean cultivar grown under two cropping systems in Durango, México.

INTRODUCTION: In the State of Durango, México, common bean (Phaseolus vulgaris) is the most important food product used for direct human consumption, after grain cooking. Common bean is cultivated mainly under rainfed conditions in despite of its decisive role in local economy, human nutrition and nutraceutical contribution for human health. Under rainfed conditions water shortage (intermittent drought) and yield losses in common beans are the main factors causing negative impacts on the farmer´s economy. Some attempts have been made to use common beans under irrigated conditions in order to improve water productivity and to stabilize seed yield. Early maturity and low water requirements were introduced in modern ‘pinto’ common bean cultivars in order to improve seed yield. Characterization of modern cultivars is required in order to implement the use of technological tools for precise irrigation scheduling; as well as for phenology and yield prediction. The growing degree days (°D) concept, which is based on actual temperatures, is considered as a simple and accurate method to predict when a certain plant stage will occur (Miller et al., 2001). The objective of this study was to evaluate effects of three water regimes on phenology and seed yield of common bean at three experimental sites in the State of Durango, México.

El objetivo fue validar días a madurez, rendimiento, peso de 100 semillas y preferencia de cinco variedades de frijol pinto. Se evaluaron la madurez, rendimiento y peso de 100 semillas en 9 a 13 sitios con las variedades Pinto Centauro, Pinto Bravo, Pinto Centenario, Pinto Libertad, Pinto Coloso y Pinto Saltillo (testigo). En un estudio de preferencia se determinó la calidad de las variedades para el comercio, consumo e industria con base en atributos del grano crudo, cocido y enlatado. Las nuevas variedades fueron más precoces para madurar (89-92 días), que Pinto Saltillo (92-96 días) y tuvieron grano de mayor tamaño (34-38 g 100 semillas-1 vs. 30-31 g 100 semillas-1). La mayoría de las variedades validadas mostraron alta preferencia comercial (15.1-18.3%) y de consumo (4.1-4.7, en la escala de 1 a 5). Después del enlatado Pinto Saltillo registró el mayor rendimiento en peso (263%) y porcentaje de granos reventados (60%). Las variedades validadas mostraron precocidad, semillas más grandes, alto rendimiento y mayor preferencia para productores, comerciantes y consumidores de frijol., The objective of this paper was to validate the days to maturity, yield, 100 seed weight and preference of five varieties of pinto beans. We evaluated the maturity, yield and weight of 100 seeds in 9-13 sites Pinto varieties Centaur, Pinto Bravo, Pinto Centennial, Pinto Libertad, Pinto Saltillo and Pinto Coloso (control). In a preference study, we determined the quality of the varieties for trade and industry consumption based on attributes of raw grain, cooked and canned. The new varieties were earlier to mature (89-92 days), Pinto Saltillo (92-96 days) had the largest grain (34-38 g 100 seeds-1 vs 30-31 g 100 seeds Most commercial strains showed high preference (15.1-18.3%) and consumption (4.1-4.7, on the scale of 1 to 5). After canning, Pinto Saltillo recorded the highest yield in weight (263%) and percentage of popped grains (60%). Validated varieties precociousness, larger seeds, high yield and higher preference for producers, traders and consumers.